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KTVT, CBS' owned-and-operated station in Dallas, on Aug. 4 is scheduled to switch from VHF to UHF to boost its DTV signal. Viewers with antennas and DTV converter boxes must rescan the devices and/or their DTV tuners to accommodate the change, according to this article.

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VHF signals are less likely to be picked up by handheld devices than their UHF counterparts, providing a natural mobile DTV advantage to the stations using the latter signals, according to this article. However, some experts say it's just a matter of time before technological advances will pave the way for VHF mobile to be on a level playing field with UHF.

The FCC is still handling a few reception problems related to the transition to all-digital broadcasting, as it continues its "mop-up" campaign in the wake of the June 12 switch. Some stations are being granted shifts from VHF to UHF bands to boost power and improve reception.

Some viewers in the Cincinnati area, where 14.5% of households rely on over-the-air reception, still are grappling with DTV reception issues. The most frequent complaints, similar to other markets around the country, are with tuning in stations that use VHF signals, which are not able to transmit through buildings, walls or trees as well as their UHF counterparts, according to this article.

Some TV viewers in New Jersey still are experiencing reception problems weeks after the transition to all-digital broadcasting. Signals of some broadcast stations in the New York market reach New Jersey on the UHF band, so viewers with VHF antennas are finding they need new equipment.

Although many viewers are likely to be able to solve their DTV reception problems with VHF channels by changing their antennas, the issue of interference might constrain the nearly 500 full-power outlets with VHF channels from fully exploiting their mobile DTV potential, according to this article. VHF signals, which have long wavelengths, reportedly are less likely than UHF signals, which have short lengths, to be captured by mobile devices' small antennas.